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achromatic

adjective

/ˌækrəˈmætɪk/

Meaning

without color; free from color

The designer chose an achromatic palette of black, white, and gray.

colorless, neutral, grayscale, monochrome

colorful, vivid

achromatic palette, achromatic vision, achromatic scheme

no longer fresh; lacking originality or novelty

causing or able to cause death; extremely dangerous; lethal

never changing; constant; always the same

not likely to happen or be true

having great knowledge or experience; complex; refined; advanced

Of or relating to a synapse or synapses.